Easy math problem giving brainlist
2 answers:
Answer:
Use The Distributive Property of Equality
Step-by-step explanation:
In order to combine all the like terms you first need to get rid of those parentheses
you do this by doing the distributive property of
This will get you
Now you can combine like terms and them move the variable and constants to different sides.
Answer = Use The Distributive Property of Equality
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Answer:
We conclude that the population mean is 24.
Step-by-step explanation:
We are given the following in the question:
Population mean, μ = 24
Sample mean, = 22.8
Sample size, n = 100
Alpha, α = 0.05
Sample standard deviation, s = 8.3
First, we design the null and the alternate hypothesis
We use Two-tailed z test to perform this hypothesis.
Formula:
Putting all the values, we have
We calculate the p-value with the help of standard z table.
P-value = 0.1498
Since the p-value is greater than the significance level, we accept the null hypothesis. The population mean is 24.
Now,
Since, the z-statistic lies in the acceptance region which is from -1.96 to +1.96, we accept the null hypothesis and conclude that the population mean is 24.